One-loop Corrections to the Two-Body Decays of the Charged Higgs Bosons in the Real and Complex NMSSM

TL;DR

This paper calculates detailed one-loop electroweak and QCD corrections to charged Higgs boson decays in the NMSSM, enhancing the precision of decay predictions and providing an updated computational tool.

Contribution

It provides the first comprehensive implementation of NLO SUSY corrections for charged Higgs decays in the NMSSM within the NMSSMCALCEW code.

Findings

NLO corrections significantly affect decay branching ratios.

The updated code is publicly available for broader use.

Corrections vary across parameter space, impacting experimental analyses.

Abstract

We evaluate the full next-to-leading order supersymmetric (SUSY) electroweak and SUSY-QCD corrections to the on-shell two-body decays of the charged Higgs bosons in the framework of the CP-conserving and CP-violating Next-to-Minimal Supersymmetric extension of the Standard Model (NMSSM). Our corrections are implemented in the code NMSSMCALCEW in order to compute the branching ratios of the charged Higgs boson where we also take into account the state-of-the-art QCD corrections already included in the code. We investigate the impact of the NLO corrections for each decay mode in a wide range of the parameter space that is allowed by the theoretical and experimental constraints. The new version of NMSSMCALCEW is made publicly available.